Waterproofing air and vapor barrier membrane

Abstract

An integrated waterproofing and air/vapor barrier membrane is provided which comprises a preformed waterproofing or sealing material layer ( 1 ) covered on one face with adherent impervious material ( 1 ), and on the other major face with an adherent porous support sheet ( 16 ). The waterproofing or sealing material layer can be covered on both sides with adherent support sheets. Heating of the barrier membrane allows self-adhesion to a surface on which it is applied after transudation of fusion of the sealing material through the support sheets.

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         11 . A barrier membrane substantially impervious to atmospheric air and vapor for covering a construction surface or an area comprising a sealing material layer having opposite first and second sides, said first and second sides being coated with a support sheet composed of material allowing transudation or fusion of said sealing material through said support sheet to allow self-adhesion of the first side of said barrier membrane on said construction surface, and to a second surface on the second side.  
     
     
         12 . The barrier membrane of  claim 11 , wherein said sealing material is composed of air- and water-repellant material selected from the group consisting of a bitumen, a polymer, a resin, and a mixture thereof.  
     
     
         13 . The barrier membrane of  claim 12 , wherein said bitumen is a polymer-modified asphalt.  
     
     
         14 . The barrier membrane of  claim 11 , wherein said sealing material further comprises up to 40% by weight of filler.  
     
     
         15 . The barrier membrane of  claim 11 , wherein said support sheet is composed of material selected from the group consisting of a polymer, a resin, a plastic, a polyester, a polypropylene, a polybutyrene, a polyimide, a polycarbonate, a polyamide, a polyethylene, a polystyrene, a polyvinylchloride, a fluoroplastic, a sulfone polymer, and a polyvinylidene chloride.  
     
     
         16 . The barrier membrane of  claim 11 , wherein said sealing material comprises between 50 to 100% of bitumen, and up to 50% by weight of at least one copolymer, wherein combination of said bitumen and said copolymer forms 100% of said sealing material.  
     
     
         17 . The barrier membrane of  claim 16 , wherein said copolymer is styrene-butanediene-styrene, ethylene, propylene, butene, a derivative or a mixture thereof.  
     
     
         18 . The barrier membrane of  claim 11 , wherein said sealing material transudes or fuses through support sheet on at least one side after heating of said barrier membrane.  
     
     
         19 . A laminated panel used for construction covered at least partially with a barrier membrane as defined in  claim 1 .  
     
     
         20 . A laminated panel used for construction covered at least partially with a barrier membrane as defined in  claim 11 .  
     
     
         21 . The laminated panel of  claim 20 , wherein said panel is a board of wood, concrete, gypsum, perlite, kraft, foam, wood fiber or plywood.  
     
     
         22 . A method for protecting a construction surface against atmospheric air and vapor comprising the steps of: 
 applying a construction surface with a barrier membrane as defined in  claim 1;  and    heating said barrier membrane applied on said construction surface for a time and to a temperature allowing said sealing material to transude or fuse through one side of said support sheet and adhere to said construction surface.    
     
     
         23 . The method of  claim 22 , wherein a structural panel is adhered to the second side of said barrier membrane before or after adhesion to said construction surface.  
     
     
         24 . The method of  claim 23 , wherein said structural panel is a board of insulating material, a paper sheet, or a metallic sheet.